Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fc71c069daa5e8…

MALICIOUS

PDF

87.1 KB Created: 2021-09-07 11:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e44dc5d3a5e4a059a4cbaa1023816985 SHA-1: 9bd2e56a68944fa3534892141f382bf6093903a0 SHA-256: e7fc71c069daa5e8c065188509c4b955d799df41718d9941e68dfc3b31879850
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://snoman.mb.ca/ckfinder/userfiles/files/vuduwisamotegazin.pdf In PDF document text
    • http://blueyee.com/upload/file/081648032788.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcfd9741f6---wapit.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/18900783196.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/dixudomakukabijumabagaku.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/sutevokubezaxoraxi.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/sodugu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736725b8386---54992483985.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/tilibo.pdfIn PDF document text
    • http://derma-dts.de/files/file/67993778062.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/ad3b27224255d9b1d8ac82601d61d207/50495998076.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/13576371677.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/4868f8ec86b89c9f1bed153520005f95/fonivizesamali.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/0d248d0d642025bf6de743743eddeed3/xalaregojawiwar.pdfIn PDF document text
    • http://cc-loges.com/uploads/file/xogijadiwibub.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-6-1/20210601184217738164.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160bb43bf68ec8---8095170814.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/58509507469.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613548f0101cc---vonukopanugolenivimar.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16081f94289931---64433687474.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5df222626e---341333405.pdfIn PDF document text
    • http://aven.su/userfiles/file/54176929331.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/f31c3fb38581587014106e18dab4ac09/kuluf.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/kjiuaavgisl025mdoqe6cq3sgs/zunoxiwogetikid.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/kulivuxosizibafikapuwa.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/rgbof3sq1svj4gmccke5kgl4f2/59033796192.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607235fa800a4---12418168765.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=historia+gentis+langobardorum+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 17420 bytes
SHA-256: 59d376ab3e28994fdd879b5958e68e54c87a3ee7a5fe17dbdc589ac5f51bcd44
font_01_sfnt_off00011cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF9 11072 bytes
SHA-256: 4a1eec17719e41de20a5b51d4086d59963a8d6cd25bf46a6fbe3ed5e8c5898be
font_02_sfnt_off0001364e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1